Emitter structures for enhanced thermionic emission
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United States of America Patent
Stats
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Aug 17, 2021
Grant Date -
Feb 4, 2021
app pub date -
Aug 1, 2019
filing date -
Aug 1, 2019
priority date (Note) -
In Force
status (Latency Note)
Importance
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Abstract
In one embodiment, a system includes a cathode and a thermionic emitter installed at least partially within the cathode tube of the cathode. The thermionic emitter is in a shape of a hollow cylinder. The hollow cylinder includes an outer surface and an unsmooth inner surface. The outer surface is configured to contact an inner surface of the cathode tube. The unsmooth inner surface includes a plurality of structures that provide an increase in surface area over a smooth surface.
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International Classification(s)
- 2019 Application Filing Year
- H01J Class
- 2606 Applications Filed
- 1833 Patents Issued To-Date
- 70.34 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- H01J Class
- 0 % this patent is cited more than
- 4 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Feb 17, 2025 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Feb 17, 2029 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 17, 2033 |
